Gründjitobel Viaduct
Coordinates: 46 ° 49 ′ 29 " N , 9 ° 41 ′ 30" E ; CH1903: 771887 / one hundred and eighty-eight thousand four hundred twenty-four
| Gründjitobel Viaduct | ||
|---|---|---|
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| use | railroad | |
| Crossing of | Gründjitobelbach | |
| place | Langwies | |
| construction | Reinforced concrete arch bridge | |
| overall length | 145 m | |
| Longest span | 85 m | |
| height | 46 m | |
| start of building | Late June 1913 | |
| completion | Early July 1914 | |
| opening | December 1914 | |
| construction time | 1 year | |
| Status | in use | |
| planner | Jakob Bolliger | |
| location | ||
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| Above sea level | 1270 m above sea level M. | |
The Gründjitobel Viaduct is a single-lane railway bridge of the Rhaetian Railway in the area of the municipality of Arosa (formerly Langwies ) in the canton of Graubünden in Switzerland .
location
The structure is part of the narrow-gauge Chur – Arosa railway line and is located between Peist and Langwies in the Matten-Gründji area. The viaduct leads the railway line over the Gründjitobel, a deeply cut moraine gorge made of gravel and provided with sandy erosion formations («Steimannli») .
history
Due to the difficult geological conditions in Schanfigg , a total of 19 tunnels and 52 bridges had to be built for the Chur-Arosa Railway, which was privately built between 1912 and 1914 . Most of the bridges were built in the classic way from stone, a building material that the nearby Plessur made available in sufficient quantities. Iron bridges were built in places where the building site was particularly restless. A completely new type of construction was used due to the route to be overcome at the Gründjitobel Viaduct and the Langwieser Viaduct, which is only a little south-east : Instead of a bridge with several openings, a sensational structure made of reinforced concrete with a large span was created. The danger that piers in the course of the river could be washed away could thus be successfully countered; since the existence of the railway, erosion has hardly harmed this structure.
Technical specifications
The Gründjitobel Viaduct is 145 m long. The main opening consists of an arch with 85 m span and 46 m height above the valley floor. The entire construction was practically trouble-free and was completed in just one year. Together with the larger Langwieser Viaduct, the Gründjitobel Viaduct was one of the widest-span railway bridges in the world when it was built. The falsework , which was already used for the construction of the Halen Bridge in Bern, came from Richard Coray from Trin , like the Langwieser Viaduct . Construction began on July 10, 1913, and was completed on August 26, 1913. The massive main arch in the tradition of Robert Maillart with a horizontal rectangular cross-section was concreted on September 15 of the same year, the construction was completed on July 1, 1914. The work planned by the "father" of the Halen Bridge, engineer Jakob Bolliger, was built by the Müller, Zeerleder and Gobat, which, with the exception of the Langwieser section, built the entire Peist- Arosa line.
gallery
The Gründjitobel with Steimannli from the east
View from the west to the Arosa Dolomites
View from the Gründjitobel to the viaduct
Viaduct with regional train
View from Gründji
View from the east portal of the Matten tunnel to the bridge route. In the back the Chüpfenflue
swell
- Hans-Bernhard Schönborn, The Rhaetian Railway, past and present , GeraMond 2009, ISBN 978-3-7654-7162-9 , p. 119.
- Marcel Just, Christof Kübler, Matthias Noell (Eds.) Arosa - The Modern Age in the Mountains , gta Verlag, Zurich 2007, ISBN 978-3-85676-214-8 , p. 14.
- Reinforced concrete bridges on the Chur - Arosa branch line. In: Zentralblatt der Bauverwaltung, No. 28 of April 8, 1914, p. 220 ( digitized version )
- Hans Domenig: From Tingelzüglein to Hochgebirgsbahn , in: Terra Grischuna , 59th year, issue 1, Terra Grischuna Verlag, Chur 2000, ISSN 1011-5196 .
- Eisenbahn Journal, Die RhB, specials part 3 , Hermann Merker Verlag GmbH Fürstenfeldbruck, 1998, p. 58 ff. ISBN 3-89610-038-6 .
- Hans Hofmann: Chur-Arosa, from the construction and operation of the railway , 2nd edition, Calanda Verlag H. Hofmann, Chur 1989/93, ISBN 3-905260-11-5 .
- Katharina Hess, Paul Emanuel Müller: About the wild Plessur , in: Terra Grischuna, 48th year, issue 1, Terra Grischuna Verlag, Chur 1990, ISSN 1011-5196 .
- Fritz Maron: Chur-Arosa-Bahn, in: Vom Bergbauerndorf zum Weltkurort Arosa , Verlag F. Schuler, Chur 1934, pp. 108-134.
- A. Jenny: Arosa and the Chur-Arosa-Bahn , Orell Füsslis Wanderbilder No. 372–374 (undated).
- Hartmann: The Chur-Arosa Railway , in: Heimatschutz, Year X, 1915.
- H. Hiltbrunner: Graubünden: The Chur-Arosa-Bahn and the health resort Arosa (separate print), Sadag publishing house, Geneva no year (around 1915).
